...Bad MAP sensor Water/dirt intrusion affecting MAP sensor connector Intermittent open in the reference, ground, or signal wire for the MAP sensor Intermittent short in the reference, ground, or signal ...
Question about Chevrolet HHR
...ground from the PCM. The return signals are separate wires. Just something to look at. Yes when my camshaft was bad my car would always cut off It could but its likely not a bad cam shaft . The ...
...bad or ?? First make sure all grounds are good. There is a ground going from the pcm to the engine. Many chevy engines had a pcm ground connected to the thermostat bolt. Not sure about the Saturn. A ...
...bad connection at the sensor An open in the ground circuit between the ECT sensor and the PCM A short in the voltage feed between the sensor and the PCM A bad PCM (less likely) A bad temperature ...
Question about Chevrolet HHR
...ground is bad all are. this is done on purpose, so the PCM can measure ground errors and adjust sensor readings accordingly. now Ill look yours up. since you stated its a 4.7L , most poster here have ...
Question about Chevrolet HHR
...GROUND PULSE WHY Open circuit to PCM - the engine computer grounds the other side of the injector there by turning it on an off very rapidly . This is call PWM - pulse width modulation . There is a ...
Question about Cars & Trucks
...ground is bad. Year make and model? For the last 15 years+ the ground is from the ECM/PCM. You basically have 3 problems that would cause this. The PCM is bad, the wire to the relay from the PCM is ...
...bad connection at the sensor An open in the ground circuit between the ECT sensor and the PCM A short in the voltage feed between the sensor and the PCM A bad PCM (less likely) A bad temperature ...
Question about Jeep Cars & Trucks
...bad and easy to hot wire test it ask. all shops know how. it is a stnd ASE test. now a drawing, from 99 SM the PCM controls the starter motor relay,100% 8w-30-11, SM PAGE., see this. the PCI bus he ...
Question about Chevrolet HHR
...ground causing injector to fire constantly . It's probably not the PCM , If injector driver inside the PCM was bad the injector wouldn't fire at all . On the injector there are two wires , one is B+ ...
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